A smoke exhaust pipe assembly and a range hood using the same

Abstract

The utility model discloses a kind of exhaust pipe assemblies and range hood applied to the exhaust pipe assembly of this, the exhaust pipe assembly includes pipe body and the sound-absorbing component being set at the outside of pipe body, the pipe body includes first section, the sound-absorbing component includes sound-absorbing piece, the sound-absorbing piece is wrapped in the outer periphery of first section, the pipe body also includes second section along length direction, the sound-absorbing component also includes first sound-absorbing pipe, the first sound-absorbing pipe is set in the outer periphery of at least part second section, the wall surface of second section in cooperation with first sound-absorbing pipe portion is the wall surface that can be passed by noise, and the outer peripheral wall surface between the both ends of first sound-absorbing pipe and second section is closed, and it forms the noise reduction cavity between first sound-absorbing pipe and second section. Compared with prior art, the utility model has the advantages that: by combining different sound-absorbing scheme, so that better noise reduction effect is realized.

Description

Technical Field

[0001] This utility model relates to oil fumes and oil fume purification devices, and in particular to an exhaust pipe assembly and a range hood using the exhaust pipe assembly. Background Technology

[0002] As the performance of range hoods continues to improve, noise problems are becoming increasingly prominent. The noise of range hoods seriously affects the user experience and has a serious impact on the user's physical and mental health.

[0003] Currently, the market generally uses smooth stainless steel flue pipes and plastic straight pipes to replace the original corrugated flexible pipes, or wraps a layer of sound-absorbing cotton directly around the existing flue pipe to reduce noise.

[0004] For example, Chinese invention patent application number 202011337232.8 discloses a frame-type range hood sound-absorbing box based on modified composite sound-absorbing cotton, which includes a range hood shell, a frame, and a smoke extraction duct. The range hood shell is installed on the wall, the frame is installed below the range hood shell, and the smoke extraction duct is installed on the top of the range hood shell. The inner layer of the smoke extraction duct is made of stainless steel high-temperature resistant flexible tubing, and the outer layer of the stainless steel high-temperature resistant flexible tubing is wrapped with a sound-absorbing layer.

[0005] The aforementioned range hoods reduce noise by wrapping a sound-absorbing layer made of sound-absorbing cotton around the outside of the flue, but this is only effective for mid-to-high frequency noise, and the noise reduction effect is relatively limited. It cannot eliminate low-frequency and wider frequency noise. Utility Model Content

[0006] The first technical problem to be solved by this utility model is to address the shortcomings of the existing technology by providing a smoke exhaust pipe assembly that can not only eliminate and reduce mid-to-high frequency noise, but also eliminate and reduce low-frequency or wider frequency noise.

[0007] The second technical problem to be solved by this utility model is to provide a range hood that uses the exhaust pipe assembly.

[0008] The first technical solution adopted by this utility model to solve the first technical problem mentioned above is: a smoke exhaust pipe assembly, including a pipe body and a sound-absorbing component disposed on the outside of the pipe body, the pipe body including a first section, the sound-absorbing component including a sound-absorbing element, the sound-absorbing element being wrapped around the outer periphery of the first section, characterized in that:

[0009] The tube body further includes a second section along its length, and the silencing assembly further includes a first silencing tube. The first silencing tube is disposed on the outer periphery of at least a portion of the second section. The wall surface of the second section that mates with the first silencing tube is a wall surface that allows noise to pass through. Both ends of the first silencing tube are closed between the outer periphery of the second section and the second section, forming a noise reduction cavity between the first silencing tube and the second section.

[0010] By adding a first silencer tube to the outer periphery of the tube body, a noise reduction cavity is formed in conjunction with the tube body, thereby eliminating and reducing low-frequency noise and wider-bandwidth noise, and improving the noise reduction effect.

[0011] Furthermore, the pipe body also includes a third section along its length, and the silencing assembly also includes a second silencing pipe. An expansion chamber is formed inside the second silencing pipe. The ends of the second section and the third section are both inserted into the second silencing pipe. One end of the second silencing pipe is closed between the outer peripheral wall of the second section and the other end of the second silencing pipe is closed between the outer peripheral wall of the third section and a gap is formed between the second section and the third section.

[0012] The noise reduction assembly also includes a second noise reduction tube, which works with the tube body to form an expanded noise reduction structure with an inner tube, capable of eliminating a wider range of noise, thereby achieving the elimination of high-frequency, low-frequency and other wide-range noise, and further improving the noise reduction effect.

[0013] Preferably, the length of the expansion chamber is L, one of the second and third segments is inserted into the expansion chamber for a length of L / 2, and the other segment is inserted into the expansion chamber for a length of L / 4.

[0014] The second technical solution adopted by this utility model to solve the first technical problem mentioned above is: a smoke exhaust pipe assembly, including a pipe body and a sound-absorbing component disposed on the outside of the pipe body, the pipe body including a first section, the sound-absorbing component including a sound-absorbing element, the sound-absorbing element being wrapped around the outer periphery of the first section, characterized in that:

[0015] The pipe body further includes a third section along its length, and the silencing assembly further includes a second silencing pipe. An expansion chamber is formed inside the second silencing pipe. The ends of the first section and the third section are both inserted into the second silencing pipe. One end of the second silencing pipe is closed to the outer peripheral wall of the first section, and the other end of the second silencing pipe is closed to the outer peripheral wall of the third section. A gap is formed between the first section and the third section.

[0016] By adding a second silencer tube to the outer periphery of the tube body, an expansion-type silencer structure is formed in conjunction with the tube body, which can eliminate a wider range of noise and further improve the noise reduction effect.

[0017] Preferably, the length of the expansion chamber is L, one of the first and third segments is inserted into the expansion chamber for a length of L / 2, and the other segment is inserted into the expansion chamber for a length of L / 4.

[0018] The technical solution adopted by this utility model to solve the second technical problem mentioned above is: applying the aforementioned exhaust pipe assembly.

[0019] Compared with the prior art, the advantages of this utility model are as follows: by adding a first silencer tube to the outer periphery of the tube body, which works with the tube body to form a noise reduction cavity, low-frequency noise and wider frequency noise can be eliminated and noise reduction can be improved; or by adding a second silencer tube to the outer periphery of the tube body, which works with the tube body to form an expansion silencer structure, wider frequency noise can be eliminated and noise reduction can be further improved. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the exhaust pipe assembly according to an embodiment of the present utility model;

[0021] Figure 2 This is a side view of the exhaust pipe assembly according to an embodiment of the present utility model;

[0022] Figure 3 This is a schematic diagram of the installation of the exhaust pipe assembly according to an embodiment of the present utility model. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0024] See Figure 3 A range hood includes a range hood output end 31, which is directly or indirectly connected to an exhaust pipe assembly. In this embodiment, the range hood output end 31 and the exhaust pipe assembly are connected by an elbow 4. One end of the elbow 4 is connected to the pipe body 1, and the other end of the elbow 4 is connected to the range hood output end 31.

[0025] See Figures 1-2 The exhaust pipe assembly includes a pipe body 1 and a silencer assembly 2 disposed on the outside of the pipe body 1.

[0026] The tube body 1 can be divided into a first section 11, a second section 12, and a third section 13 along its length. The silencing assembly 2 includes a sound-absorbing element 21, made of sound-absorbing material, which wraps around the outer periphery of the first section 11 and can eliminate and reduce mid-to-high frequency noise. The silencing assembly 2 also includes a first silencing pipe 22, which is disposed on at least a portion of the outer periphery of the second section 12, and both ends of the first silencing pipe 22 are sealed between the outer periphery of the second section 12, such as by forming bends or flanges at the ends. This forms a noise reduction cavity 221 between the first silencing pipe 22 and the second section 12, which is a resonant cavity structure capable of eliminating and reducing low-frequency noise. The wall surfaces of the first section 11 that cooperate with the sound-absorbing element 21 and the second section 12 that cooperate with the first silencing pipe 22 are all in a form that allows noise to pass through, commonly such as perforated plates.

[0027] The silencing assembly 2 also includes a second silencing pipe 23, which has an expansion chamber 231 formed inside. The ends of the second segment 12 and the third segment 13 are both inserted into the second silencing pipe 23. One end of the second silencing pipe 23 is sealed between the outer peripheral wall of the second segment 12, and the other end of the second silencing pipe 23 is sealed between the outer peripheral wall of the third segment 13. The sealing can be achieved by forming a bend or flange at the end. A notch 14 is formed between the second segment 12 and the third segment 13.

[0028] Therefore, the second segment 12, the third segment 13, and the second silencer tube 23 together constitute an expansion-type noise reduction structure with an inner tube, which can increase the noise reduction bandwidth. For example, one segment of the second segment 12 and the third segment 13 has an insertion length within the expansion chamber 231 that is half the length of the expansion chamber 231 (L), i.e., L / 2. The other segment of the second segment 12 and the third segment 13 has an insertion length within the expansion chamber 231 that is half the length of the expansion chamber 231, i.e., L / 4. The L / 2 length inner tube segment can suppress the passage of sound waves with odd multiples of half the wavelength, while the L / 4 length inner tube segment can effectively suppress the passage of sound waves with even multiples of half the wavelength, thereby improving the ability to eliminate broadband noise. In this embodiment, the second segment 12 has an insertion length of L / 2 within the expansion chamber 231, while the third segment 13 has an insertion length of L / 4 within the expansion chamber 231.

[0029] In this embodiment, along the oil fume flow path, see... Figure 1 As shown by arrows A and B, the first segment 11, the second segment 12, and the third segment 13 are arranged in sequence. If possible, the positions of the above segments can be changed. The sound-absorbing component 21 of the sound-absorbing assembly 2 and each sound-absorbing pipe can be replaced accordingly, while maintaining the matching relationship with each segment of the pipe body 1.

[0030] Alternatively, only the first segment 11 and the second segment 12 can be provided, and the silencing assembly 2 can be adapted to only provide the sound-absorbing element 21 and the first silencing pipe 22. Alternatively, only the first segment 11 and the third segment 13 can be provided, with the first segment 11 being longer than the sound-absorbing element 21, and replacing the second segment 12 so that its end is inserted into the second silencing pipe 23.

Claims

1. A smoke exhaust pipe assembly, comprising a pipe body (1) and a sound-absorbing component (2) disposed outside the pipe body (1), wherein the pipe body (1) comprises a first section (11), and the sound-absorbing component (2) comprises a sound-absorbing element (21), the sound-absorbing element (21) being wrapped around the outer periphery of the first section (11), characterized in that: The tube body (1) further includes a second section (12) along its length, and the silencing assembly (2) further includes a first silencing tube (22). The first silencing tube (22) is disposed on the outer periphery of at least part of the second section (12). The wall surface of the second section (12) at the part that mates with the first silencing tube (22) is a wall surface that allows noise to pass through. Both ends of the first silencing tube (22) are closed between the outer periphery of the second section (12), and a noise reduction cavity (221) is formed between the first silencing tube (22) and the second section (12).

2. The smoke exhaust pipe assembly according to claim 1, characterized in that: The tube body (1) further includes a third section (13) along its length. The silencing assembly (2) further includes a second silencing tube (23). An expansion chamber (231) is formed inside the second silencing tube (23). The ends of the second section (12) and the third section (13) are inserted into the second silencing tube (23). One end of the second silencing tube (23) is closed between the outer peripheral wall of the second section (12). The other end of the second silencing tube (23) is closed between the outer peripheral wall of the third section (13). A gap (14) is formed between the second section (12) and the third section (13).

3. The smoke exhaust pipe assembly according to claim 2, characterized in that: The length of the expansion chamber (231) is L, one of the second segment (12) and the third segment (13) is inserted into the expansion chamber (231) for a length of L / 2, and the other segment of the second segment (12) and the third segment (13) is inserted into the expansion chamber (231) for a length of L / 4.

4. A smoke exhaust pipe assembly, comprising a pipe body (1) and a sound-absorbing component (2) disposed outside the pipe body (1), wherein the pipe body (1) comprises a first section (11), and the sound-absorbing component (2) comprises a sound-absorbing element (21), the sound-absorbing element (21) being wrapped around the outer periphery of the first section (11), characterized in that: The tube body (1) further includes a third section (13) along its length. The silencing assembly (2) further includes a second silencing tube (23). An expansion chamber (231) is formed inside the second silencing tube (23). The ends of the first section (11) and the third section (13) are inserted into the second silencing tube (23). One end of the second silencing tube (23) is closed with the outer peripheral wall of the first section (11). The other end of the second silencing tube (23) is closed with the outer peripheral wall of the third section (13). A gap (14) is formed between the first section (11) and the third section (13).

5. The exhaust pipe assembly according to claim 4, characterized in that: The length of the expansion chamber (231) is L, one of the first segment (11) and the third segment (13) is inserted into the expansion chamber (231) for a length of L / 2, and the other segment of the first segment (11) and the third segment (13) is inserted into the expansion chamber (231) for a length of L / 4.

6. A range hood, characterized in that: The application includes the exhaust pipe assembly as described in any one of claims 1 to 5.

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